-th a-a a-b a-c a-t aaa aab aac aad aae aah aak aat ab- aba abb abc abd abe abh abk abt ac- aca acb acc acd ace ach ack act ad- ada adb adc add ade adh adk adt aea aeb aec aed aee aeh aek aet aha ahb ahc ahd ahe ahh ahk aht aka akb akc akd ake akh akk at- ata atb atc atd ate ath att baa bab bac bad bae bah bak bat bba bbb bbc bbd bbe bbh bbk bbt bca bcb bcc bcd bce bch bck bct bda bdb bdc bdd bde bdh bdk bdt be- bea beb bec bed bee beh bek bet bha bhb bhc bhd bhe bhh bhk bht bka bkb bkc bke bkk bkt bta btb btc btd bte bth btk btt c-- caa cab cac cad cae cah cak cat cba cbb cbc cbd cbe cbh cbk cbt cca ccb ccc ccd cce cch cck cct cda cdb cdc cdd cde cdh cdk cdt ce- cea ceb cec ced cee ceh cek cet ch- cha chb chc chd che chh chk cht cka ckb ckc ckd ckh ckt cta ctb ctc ctd cte cth ctk ctt daa dab dac dad dae dah dak dat dba dbb dbc dbd dbe dbh dbk dbt dca dcb dcc dcd dce dck dct dda ddb ddc ddd dde ddh ddk ddt de- dea deb dec ded dee deh dek det dh- dha dhb dhc dhd dhe dhh dhk dht dka dkb dkc dke dkk dkt dta dtb dtc dtd dte dth dtk dtt eaa eab eac ead eae eah eak eat eba ebb ebc ebd ebe ebh ebk ebt ec- eca ecb ecc ecd ece ech eck ect ed- eda edb edc edd ede edh edk edt eea eeb eec eed eee eek eet eha ehb ehc ehd ehe ehh eht eka ekb ekc ekd eke ekh ekt eta etb etc etd ete eth etk ett haa hab hac had hae hah hak hat hba hbb hbc hbd hbe hbh hbk hbt hca hcb hcc hcd hce hch hck hct hda hdb hdc hdd hde hdh hdk hdt he- hea heb hec hed hee heh hek het hha hhb hhc hhd hhe hhh hhk hht hka hkb hkd hkh hkk hkt hta htb htc htd hte hth htk htt k-t ka- kaa kab kac kad kae kah kak kat kba kbb kbc kbd kbe kbh kbk kca kcb kcc kcd kce kch kck kct kda kdb kdc kde kdh kdk kdt ke- kea keb kec ked kee keh kek ket kha khe khh khk kkb kkc kke kkh kkk kkt kta ktb ktc kte kth ktk ktt taa tab tac tad tae tah tak tat tba tbb tbc tbd tbe tbh tbk tbt tca tcb tcc tcd tce tch tck tct tda tdb tdc tdd tde tdh tdk tdt te- tea teb tec ted tee teh tek tet th- tha thb thc thd the thh thk tht tka tkb tkc tke tkk tkt tta ttb ttc ttd tte tth ttk ttt